Bhutan is beautiful all year round. Depending on what type of tour you booked the weather should match.
During the spring months of March, April and May and the fall months of September, October and November, the weather is warmer and the skies are clearer making the high mountains rise to a vivid blue sky. Most of the annual festivals take place during these months. Winter is a good month to visit as well. The days are usually sunny, cool and pleasant but it’s quite cold once the sun sets in. You will need to pack warm clothing.